All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2
Castor oil is used as a lubricant in jet planes.
-5
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
More than a billion transistors are manufactured every second.
-25
The life boat was patented in 1845!
29
The electric chair was invented by a dentist!
122